That sounds so difficult and painful, especially as it relates to your fear of abandonment. While sensitivity can be a gift, it can also be incredibly painful to soak up everyone's emotions all the time. I can relate to this experience and in my case, I've found that being open with my T about it. Not to sound invalidating (as I understand how excruciating it can feel), but her and I kind of have an inside joke whenever I get triggered about a facial expression of hers or draw conclusions about what she's thinking. I have found that being open with her about what I'm noticing (in terms of her body language, moods, etc) has been the most helpful and her and I just have an established understanding that my hypersensitivity does come up in our relationship often (probably the most in any of my relationships) and she is a safe person to work on my skills with and share my fears because she does understand me. Sometimes, when I've asked her if she feels sad today, she'll be open with me and say that she is sad but that it's not about me. This helps me remember that she is human, she has a range of emotions, but I'm not the only variable affecting her.